Hydraulic valve.



No. 870,104. PATENTED NOV. 5,v 1907 D. L. HOLDEN. HYDRAULIC VALVE.

APPLICATION FILED FEB. 19, 1906.

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B W W y 'UNITED STATES l ?ATENT,.()FFICE.-=

DANIEL L. HOLDEN, OF NEW YORK, N. -Y., ASSIGNQR TO FEDERAL ICE COMPANY, OF NEW YORK, N. Y., A CORPORATIOFROF NEW YORK.

HYDRAULIC VALVE.

To all whom it may concern:

Be it known that I, DANIEL L. HotnEN, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Hydrawing, in which like parts are designated by like characters of reference, in which Figure 1 is a central vertical section of the valve and its case on line S S Fig. 2. Fig. 2 is a top view of the case, the worm and gear. the case. Fig. 4 is a top view of the valve with-the connectiontoits balancing piston cut on section line X X Fig. 1. Fig. 5 is a bottom view ofthe valve.

The valve is inclosed in a case 1 having an inlet passage 2, above the valve, and from the valve seat3 there are downwardly and outwardly curved passages located 120 apart, passage 4 with a pipe 5 leading to the operative end of the cylinder (not shown). There is a similar passage 6 and pipe 7 leading to the opposite end of the cylinder and a similar discharge passage 8 and its discharge pipe 9. Within case 1 the valve 10 is placed on seat 3, its bottom part or lower face 1]. being flat, and upwardly therefrom at 12 it is semi-spherical and joined by a neck 13 to its balancing piston, to be described later. The valve has a-direct perpendicular port 14 passing entirely through it, and inclosed by walls 15, 16. With the exception of the port 14 the valve is closed to any fluid flowing through pipe 2: The top 12, and face 11 inclose a cavity 17 with two ports 18, 19 leading throughface 11 in positions to cover passages 6, 8 when port 14 is in communication with passage 4, or, ports 14, 18, 19 are 120 degrees apart. Integrally connected to valve 10 by the neck 13 there is a piston 26 closely fitting within the case 1, and provided with packings 21, 22, held in place by a follower 23. Piston 20 has a stem 24 upwardly passing through cover 25, secured to case 1, and through a stuffing box 26 having a follower 27. A worm wheel 28 is secured to stem 24. At one side of cover 25 there are secured Specificationpf Letters Patent.

Application filed F ruary 19. 1906- Serial No. 301.796.

Fig. is a bottom view of,

Patented Nov. 5, 1907.

stands 29 supporting a shaft 30 on which is a worm 31 to drive the wheel 28, and an electric motor (not shown) will be provided to rotate the shaft, its worm, the worm wheel and valve. Entering case 1 there is a pipe 32 having a valve 33 and a pipe 34 at right angles to pipe 32, which connects with a T 35 having a pipe 36 leading to chamber 37 between follower23 and cover'25. outwardly from T 35 there is a pipe 38 connected to a safety valve 39 of any suitable construction,'with a discharge pipe 40. I

As illustrated, pressure entering pipe 2 would flow over valve 10 and under its piston 20 to port 14, passage 4 and pipe 5 to force the piston of the cylinder to which it is connected; at the completion of the stroke or movement of the piston, the motor to be provided will be energized to rotate the valve in the direction of ar- .row A, Fig. 3, putting port 18 over passage 4, and port 19 over passage 8, when the fluid flow will be through pipe 5, port 18, cavity 17 and port 19 to discharge pipe 9, the movement of the valve 10 placed port 14 over passage 6 so that pressure fluid will flow from inlet passage 2, over the valve, through port 14, passage 6 and its pipe 7 leading to the opposite side of the cylinder piston, and returning it to its original position, valve 10 will then be returned to its original position as indicated by arrow B, Fig. 3. As the pressure fluid flows over valve -10 and under piston 20 they would be balanced, if of equal area, but port 14 destroys the equilibrium, therefore to insure the seating of valve 10, sufficiently to prevent its non-leakage the pipes 32, 34 and 36 connected by T 35 and controlled by valve 33 are used to permit fluid pressure to flow from within case 1 to chamber 37 above piston 20; but inorder to insure the proper amount of pressure over the piston to keep the valve seated and avoid an excessive pressure, a pipe 38 is secured to T 35 and leading to a safety valve 39 which can be so adjusted as to secure only a desired amount of pressure.

I claim.

1. In a hydraulic valve, a case having an inlet and multiple outlets, a rotatable valve having ports to control said outlets, one of said ports passing through the valve, means to rotatethe valve for such control; a balancing piston connected to the valve and subjected to the same pressure per square inch upon its under side as the valve has upon its top; a chamber above the piston, a passage from the interior of the case to said chamber, normally open, and supplying the deficiency of pressure above the piston and a valve controlling the passage of .fluid therethrough.

2. In a hydraulic valve, 9. case having an inlet and multiple outlets, a rotatable valve having ports to control said outlets, one of said ports being through the valve, means interior of the case, and whereby the pressure of the 10 to rotate the valve for such control; a balancing piston valve upon its seat is adjusted and limited.

connected to the valve and subjected to the same pressure In testimony whereof I afllx my signature in presence per square inch upon its under side as the valve has of two wltnesses. I upon its top; a chamber above the piston, a passage nor- D ANIEL-L HOLDEN maliy open from the interior of the case to said chamber,

to supply a deficiency 0! pressure above the piston, a Witnesses: valve controlling said passage, and a safety valve adapted WILLIAM C. s'ronvnn, to limit the pressure introduced into the chamber from the Rnnson C. WEIGHT. 

